This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 1 |
| 5 | -2 |
| 6 | 0 |
| 7 | 1 |
| 8 | -4 |
| 9 | 9 |
| 10 | 0 |
| 11 | 1 |
| 12 | -8 |
| 13 | 27 |
| 14 | -64 |
| 15 | 0 |
| 16 | 1 |
| 17 | -16 |
| 18 | 81 |
| 19 | -256 |
| 20 | 625 |
| 21 | 0 |
| 22 | 1 |
| 23 | -32 |
| 24 | 243 |
| 25 | -1024 |
| 26 | 3125 |
| 27 | -7776 |
| 28 | 0 |
| 29 | 1 |
| 30 | -64 |
| 31 | 729 |
| 32 | -4096 |
| 33 | 15625 |
| 34 | -46656 |
| 35 | 117649 |
| 36 | 0 |
| 37 | 1 |
| 38 | -128 |
| 39 | 2187 |
| 40 | -16384 |
| 41 | 78125 |
| 42 | -279936 |
| 43 | 823543 |
| 44 | -2097152 |
| 45 | 0 |
| 46 | 1 |
| 47 | -256 |
| 48 | 6561 |
| 49 | -65536 |
| 50 | 390625 |
| 51 | -1679616 |
| 52 | 5764801 |
| 53 | -16777216 |
| 54 | 43046721 |